Milling tool



' April 10, 1934-y c. D. HELLYER 1,954,241l

MILLING TOOL Filed July 16, 1927 2 Sheets-Sheet l I N VE N TOR.

/5 C. D. HELLYER BY ATTORNEY.

April 1o, 1934.

c. D. HELLYER 1,954,241

MILLING TOOL Filed July 16. 1927 2 Sheets-Sheet 2 E Q. .En

#5b [.I I 3a' 45 i g 3o #o \l/ as 32 g? 3, as

| 46 l /71l 47 I6 nl' 47 50 l Il IZ hi-E1 1/ INVENTOR. C D. HELLY R BY i. #9 ATTORNEY.

Patented Apr. 10, 1934 MLLING TOOL Clement D. Hellyer, Lo

E. Hellyer administratrix of estate of said Clement D. Hellyer, deceaseds Angeles, Calif.; Fannie Application July 16, 1927, serial No. 206,178

3 Claims.

This invention relates to improvements in milling tools.

The general object of this invention is to provide an improved portable,all angle, self-centering milling tool' which is adapted for generalwork and which is particularly adapted for work on engine blocks towhich it may be quickly attached or detached. l

Another object of the invention is `to provide an improved supportingand position locking means for ametal working device.

A further object of the invention is to provide an improved holdingmeans for the rotatable spindle `of a cutting tool.

Other objects and advantages of this invention will be apparent from thefollowing description taken in connection with the accompanying drawingswherein:

Fig. 1 is a side elevation of my improved milling tool showing itclamped to an engine block in a position to recondition one ofthe valveseats therein.

Fig. 2 is a top plan view oi my device showing it turned to anotherposition relative to its supporting base.

Fig. 3 is a front end elevation of the device shown in Fig. 1.

Fig. 4 is a vertical section taken on line ,4-4 of Fig. 1. 4 i

Fig 5 is a vertical section taken on line 5-5 of Fig. 3, and

Fig. 6 is a section taken on line 6-6 of Fig. 5, showing theconstruction of the operating Wrench.

Referring to the drawings by reference characters I have indicated myimproved tool generally at 10. Although the device is particularlyadapted for use on engine blocks it will be understood that the devicewill operate with equal success `in various other capacities. My millingtool may be attached to any object or piece of work requiring milling,reaming, drilling, or any other class of operation requiring a rotatablespindle.

My tool `10 comprises a support 1l which includes a base 12 having aclamping bracket 13 mounted thereon and adapted to support a toolsupporting arm 14 which is preferably circular in cross section as shownin the drawings.

Although in the following description I describe my device in aparticular use it will be understood that the novel construction permitsof many positions and adjustments which contribute to a wide scope ofoperations of a common nature whichr heretofore could` only be done by(Cl. Sil-12.5)

rious positions to clear any obstruction. This also allows a longer orshorter adjustment of the milling tool relative to the clamping point.The base 12 is provided with an upstanding boss.V 17 which has a conicalrecess 18 therein. The lowery part of the boss 17 has a screwthreadedaperl-v ture `19 therein communicating with the bottomV of theconical recess 18. r

The bracket 13 includes a conical 18 in the base 12, and a sleeve 21having a cylinf drical aperture 22 therethrough in which the toolsupporting arm 14 is adapted to be positioned. The sleeve 2l is slittedalong one side and provided With a pair of spaced lips 23 and 24, one oneach side of the slit. r Y The lips 23 and 24 are each provided with anaperture 25 which is onthe same axis as an Vaperture 26 in the conicalboss 20.

To clamp the bracket 13 in a xed relatio ship to the base 12 and toclamp the arm 14 in xed relationship to the bracket 13, I provide aclamping bolt 27. This clamping bolt 27 includes a shank 28 adapted topass through the apertures 25 in the lips 23 and 24 and through theaperture 26 in the conical boss 20 (see Fig. 4). The shank 28 terminatesat one end in a reduced threaded end portion 29 which engages thethreaded aperture 19 in the boss 17 and at the opposite end in anenlarged head portion 30 which is adapted to engage the upper surface ofthe lip 23, when the clamping bolt is turned by the handle 30.

boss 20 (see "l Fig. 4) adapted to t within the conical recess 'liftsThe arm 14 includes a swivel joint indicated generally at 31. This jointcomprises a collar 32 integral with the arm 14 and a vspherical member33 as shown in detail in Fig. 5. The collar 32 is slit on. one side asindicated at 34 to provide lips 35 .and 36.

The lips 35-and 36 are each provided with an tion of the bolt 38 engagesa nut 39 while the shoulder formed at the juncture of the reduced endportion with the body of `the bolt is adapted 55 removing the motorblockfrom the frame of a to engage the lipY 35, thus upon a tightening of 110l sitely extending collars 40 and 41.

the clamping bolt the lips and 36 will be drawn together and the ballmember held in rigid relationship to the arm 14.

The ball member 33 is provided with oppo- An aperture 42 extends throughthe ball member 33 and the two collars and 41. The collar 40 is shown asprovided with external screw threads for receiving a head 43. The head43 may comprise a lower portion 43a and an upper portion 43b secured tothe portion 43a by threads and a pin 43C. The head is shown as providedwith an anti-friction bearing 44 and an aperture 45, part of the lengthof which is provided with screw threads as at 45' which match the screwthreads on the collar 40 of the ball member 33. If desired the headparts 43a and 43b may be made integral and the ball race may be seatedwithin the top part of the portion 43a.

In the accompanying drawings I have shown one form of toolholding'spindle 46 which includes a body portion 47 adapted for slidingmovement through the aperture 42 in the ball member 33. The body portion47, at one end, is

Iprovided with a reduced tapered portion 47 upon which a cutting toolsuch as indicated at 48 may be mounted, and a reduced end portion 49which may serve as a guide when the device 10 is used for work onvalves. Y 30 f Opposite to the tool holding end,`the spindle 46 isprovided with a squared portion 50 land with an enlarged portion orcollar at the juncture of the squared portion and the body portion 47 asindicated at 51. To position the spindle 46 Ain the device the head 43is removed, the body portion 47 of the spindle positioned in theaperture 42 in the ball member 33 and the head 43 replaced, thus thecollar 51 of the spindle Awhich is iirmly fastened to the spindle is ina position to engage one element of the ball race of the bearing 44 asshown in Fig. 5, and thus prevent upward movement of the spindle.

For rotating the spindle 46 I may provide a ratchet wrench 52 whichincludes a ratchet wheel 53 having a squared aperture therethrough whichis adapted to engage the squared portion of the spindle as clearly seenin Fig. 6. A spring pressed dog 54 is adapted, when the wrench is movedin one direction, to move the lratchet wheel 53 in the same direction,thereby turning the spindle 46and upon a movement in the reversedirection to ride freelyv over the ratchet teeth, thus a reciprocatingmovement of the wrench 52 would rotate the spindle 46 in a singledirection.

bolt 16 which may be inserted into any one of` the numerous tapped holesgenerally provided for securingthe' engine head to the block. 'If studsare used, in place of bolts', for retaining the head to the block, oneof thestuds may pass through the elongated aperture l5 in the base 12and the base clamped thereto by a nut.

After securing the base 12 to the engine block the head 43 is removedand the spindle 46 p0- 33. The arm 14 is then moved to a position overthe valve seat 55 and the guide portion 49 of the spindle positioned inthe guide hole 57 in the engine block. The swivel joint 31 and themovement of the arm 14 allow the guide 49 of the spindle 46 to beexactly centered in rela- Jtion to the valve seat, thereby assuringcorrect centeringof the tool 48 when it is operating upon the valveseat.

When the spindle 46 is correctly centered the clamping bolt 27 istightened to clamp the bracket 13 in rigid relation to the base 12 andalso to clamp the arm 14 in rigid relation to the bracket 13. Theclamping bolt 88 is then tightened to secure the ball member 33 in rigidrelation to the arm 14. After the various elements have been clampedtogether the spindle 46 is raised so that the guide portion 49 thereofclears the engine block and the tool 48 is then placed on the spindleand the spindle again lowered so that the tool contacts with the valveseat. The head 43 is then replaced and screwed down until the inner ballrace of the bearing 44 abuts the collar 51 on the spindle. Theengagement of the collar 51 against the ball race causes pressureto beapplied to the spindle and the cutter 48.

The ratchet wrench 52 or other rotating means is next positioned on thesquared end 50 of the spindle and moved to rotate the spindle, therebycausing the tool 48 to operate upon the valve seat. To feed the cutter48 to the work the head 43 is rotated as slowly or quickly as desired.

With but one setting of my device 10, various operations may beperformed upon the same valve seat, such as refacing and grinding, itbeing only necessary to withdraw the guide 49 from the engine block toremove the tool 48 on the spindle and replace it with another. Also whenthe base 12 is once clamped to the engine block the boring spindle maybe moved to various positions as the spindle holding head may be swungabout the pivotal point of the bracket cone 20 and the arm 14 may bemoved within the aperture 22 of the bracket 13, thus affording a widerange of movement for positioning the spindle.

From the foregoing description it will be apparent that I have provideda novel form of portable milling tool which may beused for many purposesand which is simple in construction, easily operated and highlyeiiicient in use.

Having thus described my invention, what I claim is:

1. In a device of the class described, a base, means to secure said baseto a support, a bracket movable on said base, an arm supported by andmovable on said bracket, a single means for clamping said bracket rigidon said base and for clamping said arm rigid on said bracket, a ball andsocket joint on said arm and means to clamp the ball of said ball andsocket joint rigid to said socket, an aperture in said ball, the axis ofsaid aperture intersecting the axis of said arm, a head detachablysecured to said ball, said head haidng an aperture therein, the axis ofsaid head aperture being in alignment with the axis of the aperture insaid ball member, a rotatable spindle passing through said head apertureand said ball member aperture, and means on said spindle for retaining atool thereon.

2. In a device of the class described, a base, means to secure said baseto a support, a boss on said base, said boss being offset to one side0f` the axis of said securing means, said boss siticned` in the aperture42 of the'ball memberhaving a recess therein, a bracket, said bracketincluding a hub positioned in said boss recess, said bracket having anaperture therein, the axis of said aperture being at right angles to theaxis of said bracket hub and offset at one side of the axis of said hub,a tool holding arm, said arm being positioned in said bracket apertureand said arm being both longitudinally and rotatably movable in saidaperture, means to simultaneously clamp said bracket rigid to said baseand said tool holding arm rigid to said bracket, said tool holding armhaving a ball and socket joint thereon, means to clamp the ball memberof said ball and socket joint rigid t0 the socket member, said ballhaving an aperture therein, a member supported by said ball,

CLEMENT D. HELLYER.

